Boring and reaming tool



D. LAMBERT BORING AND REAMING TOOL July 14, 1925. 1.546.138

Filed Nov. 1-5, 1923 2 Sheets-Sheet 1 .nummnm m I l 7 July 14, 1925. 1,546,138

D. LAMBERT BORING AND REAMING TOOL Filed Nov. 15, 192: 2 Sheets-Sheet 2 Patented July 14, 1925.

L sin-IE5 iemzeuzr DAVID LLAMBER or GLEVELANDNQHIO.

BORING AND B-EA'MING TOOL.

To all whbm it 'ma-yconcern:

Be lt'fliIlOWIl' thatI, DAVID LA'MBERT ZL 'CltiZ6n of the United :States, residing at Cleveland, in the lcountylof Cuyahoga and State of Ohlophaveinvented-certain new and useful Improvements 1n "Boring and Reaming'lools, of Which the following is a specification.

invention relates toimprovemen-ts ir boring and ream1ng'tools, and more partlcularly to that class or type l1avingtvl1at, are commonly known as expanding cutters. "The 1nvent1on*'fu'rther' relates' to an im proved cutter carrying head vparticularly designed and adapted for use .on a suitable 'lme shaft or spindlewofsuch machine tools as horizontal boring mills, lathes, and the like. i i

] The primary object is toprovide a generjallyq improved tool of the type indicated,

which Will be exceedingly simple in construction, cheap of manufacture, and etticient in ruse. i v A further/and important object 'is'the provision of an improved rotatably mounted .cu'tter, carrying lhead, ytogetherr withpimproved meansirfor simultaneously moving the blades or cutters outwardly and inwardly With the relative,circumferential movements of. the cutter carrying head on the 'drivingshaft or bar;

A further, and important object is the provision of an improved cutter carrying.

.head circumferentially: adjustable on the driving shaft, together with a relatively .tixedhead carrying suitableroughing tools "adapted toziniti'ally enter the-cylinder or article to'loe'lbored, being radially adjustable in accordance with the. ork desired.

such roughing tools A still further and wveryljimportant object a is ;therprovision otan lmproved v internally arranged locking device .loetvveen' thecutter carry ng head andlthe. drlvlng shaft, adapted toautomatically loolgsai'dsheadasagainst i retrograde movement whenmovedwforward lyfon-pnojecting. and adj usting the: cutters to. the-desired diameter,together with im} ;proved-means pp'erable vfrom the exterior of headf gfor releasing: the

the-cutter "carrying l=-o2ckingr--devicemvhen rotating the cutter earryingi-hea'd in a reverse'direction or in cutter retracting-position. v e

WVith gt-he-abiove mentioned and, other ends 'in view,zthe invention consists vin the novelv construction, arrangement and combination I of parts, hereinaftemdescribed, *{illuStrated Y in one ofits embodiments in the-accompany ing -drawings, and part1oularly po nted out in the appended claims.

"Referring 1 to 'the drawlngs, forming I, a 'part 'of th1sspec1fieation, Figure 1 is a stragmentary {side elevation of the adj acentsor connected vvorklnggpartsof a machine-tool of the horizontal horing' m ill; ty-peequipped with a I reamer or boring tool constructed inaccor-dance with this lnyention.

Fig. 2; a 1 'lonitudinal sectionalview of ""the improved cutter carrying head Withr the cutters in a partial-1y expanded-position and the parts looked upon the-"shaft.

Fig. 3, a cross se'otional -vievv, taken on line 3-3 of Fig. 1.

Fig. 4, an 'fendelevation, taken on line Fig." 5, a perspective View ofone of the radially -movable bladesorcutters detached from thecutter-carryingi head.

6, ,an end View of; the;same. "-Fig.'".7 a' vievvof the -inner or spir-al face of one ofjthe' relatively jfiXedj heads,

Fig. 8, a similar 'vievv' of the opposite relatively fixed head, detachedfi Similar numerals -o f=- referenee-@designate improved tool in connectionwitlr a machine horizontalfboring mill type hav tool of the ing the usual zvertloally; adjustable" bearing head or? block 1, carrying ,one-;end= -ofy the Joori'ng bar' 2,the=latter.communlcating vvlth and-being driven b-yftheusual mechanism.

' iThe workwto. hes-operated--upon,-fsuch for example as ,thepylinder 3-,is suitably secured to -the table. 4:;

"the -latter--With :1th goQnliected feedin mechanism? being adjust ed and fed in the usual-manner.

v In the present instance I have shown=my putting mechanism; arranged and: adjusted ,-,for use as a boring tool.

The improved mechanism V comprises a ;;cutt-er ;'carrying head 5," circumferentially movable -o'nthe bar. 2 "when it. is desiredto adyust the-cutter carryingblades; saidhead'5 being adapted to be locked on such bar in its varying verse direction for retracting the cutters circumferential positions, as hereinafter re- 1n the adjusting operation, I provide an ferred to. lmproved nternally arranged locking de- As a means of simultaneouslyexpanding' vice between said cutter carrying head or'retracting the blades or cutters 6, the 5' and tlie"'shaft In "thepre'sent'"m 70 latter are mounted in. radially extending stance,sueh locking"mechanism comprises r cutter blade receiving-and carrying recesses a locking roller or p'awld arranged in or guide-ways 5 of the head 5, a pair of a recess 5* of the head 5, said recess ;re'latively fixed heads 7 and 8 in the specific 5 communicating with the shaft 2 and 10 form of disks are mounted on the shaft 2, being provided on its outer portionwith an said fixed heads or disks b eing provided on inclined or wedge shaped surface 5, extent their inner sides with spirally arranged" ing tangentially of ma mas so that as the ribs 7 and 8, respectively, see ig s. 7 s haft 2is rotated from left to right the reli hcl f m ng spir ig o v sjte rec iv ac ive mqvement.betweenthe ha-ft dit e V and-carry the teeth or projections 6 on the cutter carrying head will cause the pawl ends of the blades or cutters 6. As a means roller 13 to Wedge into locking or holding of connecting the heads 7 and 8 upon the engagement between the surfaces of the shaft 2 to prevent relative circumferential shaft 2 and the part 5. As a means of normovement, the shaft 2 and the shaft receivmally holding the pawl rollerl3into locking ing openings of the heads 7 and 8 are prorelation with the surface 5 and the shaft,

prided with; suitable liiey-ways to receive abow springla may he interposed between and contain suitable keys 9. the base portion of the recess 5 and theroll As a means of providing a suitable rougher, the outer ends of the bow spring 14; ening tool head for carrying suitable roughing gaging with the outer ends of theroller, as tools 10, the head 8 is provided with suit shown most clearly in Figs. 2 and def the 'able opeings 8 to receive and contain the drawings.

roughing tools, said tools 10 being adapted 13y reason of the relative arrangement and to'be secured. in any desired adjusted posiconstruction of the parts it will be seen that .en the driving shaft 2 is being driven,

g openings 8 ThQ 'lZOGlS 10 are pUSllliOlTfGT WOIh, tllLlt S l'lOu adapted to perform the initial cutting in slippagebetween the parts5 and 2 by the the cylinder opening of the article to be circumferential thrusts received by the cut- I reamed or bored out, such for eXilll l ler-wtfirs in th e vork such relative movement Jas the cylinder 3 as the latter is advanced Will merely retract the cutters slightly and longitudinally and axially over the cutter thus not enlarge or dig into the opening be- 'carrying,mechanism;

As a means of adjusting the head 7 toalso that the lock only acts to prevent retro- Ward and from the head 8 for the insertion grade movement of the cutter carrying head 40 or removal-of cutters 6 in the head 5, and 5 and that the latter may at any time be ing formed in the article; "ftwi'll be seen also for permitting the relassistance'or inove d forwardly intimate expanding p0 the latter whenunlocked on the shaft 2 in sition by simply loosening somewhat the the operation of projecting or retracting the heads 7 and8 which engage with the toothed cutters to any desired adjustment, the head ends of the cutters. I l 45 7 is longitudinally adjustable on its key, As a means ofmoving the looking pawl said adjusting and clamping mechanism, in roller 13 for releasing the'lock and holding the present instance, comprising a collar -12, the same in such unlocked position upon and threadedion its interior and mounted on a during the retrograde or cutter retracting threaded portion 2 of the shaft 2. As a rotation of the head 5 and for so releasing 50 means also of taking up the end thrust inby means operable from theexterior of such cident to such clamping action of the head head, the median portion of the-pawlroller 7 toward the head 8, the shaft 2 is provided recess 15 is intersected by a threaded openluiithza shoulderiltmen 8, as shown most clearly in Fig. 2 of the said threaded portion 5 being provided drawings. The collar 12 may be provided with an adjustingscrew '53 The conical on its outer periphery"with "Wrench pin portion '5" *of the screw 5 intersects the openings 12?, to receive the pins or projecwedge shaped surface 5 of the opening or tions ofa wrench of this type. recess and engages with the adjacent por- As a imeans of automatically locking the tion of the roller so that as the screw '5 is j cutter" carrying head 5 as against retrograde moved forwardlv in the openinq bv a h ih lning.otextending to rthesurface ofrithe head, 7

movement and when such cutter carrying wrench or tool the roller 13 will be moved head is moved forwardly for projecting, the out of operative relation to the inclined sur cutters 6 to the desired adjustment, and also face 5 and against the resistance of the folwas a means for releasing the lo'clringmech ilower how" spring 14. '"Wlien the'pawl 13 is anism for returningsaid head 5 in a reheld in such unlocked position the cutter carrying head 5 may be moved freely forwardly or rearwardly on the shaft 2 for the desired expanding or retracting movements of the cutters 6 until the desired adjustment or diameter is secured. Upon the release of such pawl roller 13 by the unscrewing or retraction of the screw 5 such pawl roller will automatically lock the head 5 as against retrograde movement on the shaft 2 as the latter is driven and will permit the forward or blade projecting movement on the shaft at any time and will automatically lock such head and cutters as against retrograde movement at any position so attained, as above explained.

Having thus described one of the embodiments of my invention, without having at tempted to set forth all the forms in which it may be made, or all the modes of its use, what I claim and desire to secure by Letters Patent is,

1. In a line reamer, a line shaftcarrying spaced circumferential heads having spirals, a cutter carrying head provided with radially movable cutters having teeth engaged by said spirals, an internally arranged locking device between said cutter carrying head and shaft adapted to automatically lock said head against relative rearward movement when moved forwardly for projecting the cutters into operative set positions, and means operable from the exterior of said head for releasing said locking device for rotating said head in an opposite direction in cutter retracting relation.

2. In a cutter for machine tools, a tool carrying bar,.relatively fixed heads thereon provided with spirals, a relatively circumferentially movable cutter carrying head on said bar between said fixed heads, radially movable cutters carried by and projecting from said head in engagement with said spirals, means for locking said head on said bar between said fixed heads, and means for moving and holding said locking mechanism in released position for turning said head forwardly or rearwardly relatively of said bar for projecting and retracting said cutrelatively fixed head longitudinally toward and from said cutter carrying head when adjusting the latter, means. for automatically locking said cutter carrying head in variable circumferential positions as against retrograde movement, and means operable from the exterior of said cutter carrying head for releasing said locking means and permitting the reverse movement of said head to retract the said cutters.

i. In a line cutter for machine tools, a line shaft provided with relatively circumferentially fixed heads having right and left handed spiral grooves on their inner sides, a circumferentially movable cutter carrying head provided with movable transverse cutters having teeth projected into engagement with said spiral grooves, means for moving one of said circumferentially fixed heads longitudinally toward and from the opposite head and toward and from said cutter carrying head when adjusting the latter, means for locking said head in varying circumferential positions as against movement in vone direction, and automatic means for releasing said locking means for permitting opposite circumferential movement of said head to project or retract the said cutters.

In testimony whereof I have aflixed my signature.

DAVID LAMBERT. 

